Historic Bridges
of the United States
Big Thompson No. 1 Bridge
Larimer County
,
Colorado
Overview
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Map
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TopoZone
Terraserver USA
Facts
Overview
Pony truss bridge over Big Thompson River on US 34
Location
Larimer County
,
Colorado
Status
Open to traffic
History
Built 1937
Design
Pony truss
Dimensions
Length of largest span: 100.0 ft.
Total length: 102.0 ft.
Deck width: 29.8 ft.
Recognition
Eligible for the National Register of Historic Places
Approximate latitude, longitude
+40.38778, -105.46417
(decimal degrees)
40°23'16" N, 105°27'51" W
(degrees°minutes'seconds")
Approximate UTM coordinates
13/460603/4470901
(zone/easting/northing)
USGS topographic map
Glen Haven
Inventory numbers
CDOT C-15-I
(Colorado Dept. of Transportation structure number)
BH 11926
(Bridgehunter.com ID)
Inspection
(as of 08/2005)
Deck condition rating:
Satisfactory
(6 out of 9)
Superstructure condition rating:
Fair
(5 out of 9)
Substructure condition rating:
Satisfactory
(6 out of 9)
Appraisal:
Functionally obsolete
Sufficiency rating: 45.6
(out of 100)
Average daily traffic
(as of 2005)
5,100
Categories
Built 1937
(333)
Built during 1930s
(5,237)
Colorado
(273)
Larimer County, Colorado
(7)
NR-eligible
(2,576)
Open
(21,832)
Owned by state
(6,653)
Pony truss
(9,485)
Span length 100-125 feet
(2,299)
Total length 100-125 feet
(2,465)
Truss
(16,071)
US 34
(4)
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